b-e-d bbbee bd-re be-er bebed beber bedde bedee beder bedub bedue beebe beede beerd beffe befur berbe berde berdu bered berre berru beuer beure brebu bredd brede breed breef breer brerd brere breu- brrrr brud- brude brued bruer bruff bubbe buber budde buddu budur buffe burde burru burud ddddd debed deber dedde dedee deder dedur deede deefe deeff deere defed defer deffe derbe derde dered derre derub derue deure drdre dredd drede dreed dreff drere drude dubee duded duder duere duerr dufur durbe dured duree durer durre e-dee ebbed ebber ebure edder eddre edere edred eeeee eefde eerde efere effed effer efuru erbbe erber erdre erede erere erfde erred eurre febre fedde fedee feder feere ferde fered ferr- ferre feued feuer frede freed freer frere freud freur frude fu-fu fudde fuddu furde furud rebbe reber rebud redbd redde reder redub redur reede reefe reere refdb refed refer reffe rerde rere- reree reuer rubee ruber ruder ruede ruere ruffe rurde u-dub uber- udder ufere urdee urubu uuuuu